A Cascaded DC-AC-AC Grid-Tied Converter for PV Plants with AC-Link

被引：3

作者：

Barrios, Manuel A. ^{[1
,2
]}

Cardenas, Victor ^{[1
]}

Sandoval, Jose M. ^{[1
]}

Guerrero, Josep M. ^{[2
]}

Vasquez, Juan C. ^{[2
]}

机构：

[1] Autonomous Univ San Luis Potosi, Engn Dept, Dr Manuel Nava 8, San Luis Potosi 78290, San Luis Potosi, Mexico

[2] Aalborg Univ, Dept Energy Technol, Ctr Res Microgrids CROM, DK-9220 Aalborg, Denmark

来源：

ELECTRONICS | 2021年 / 10卷 / 04期

关键词：

AC-link; medium-frequency magnetic link; photovoltaic; multilevel converter; cascaded converter; AC-AC converter; matrix converter; MULTILEVEL INVERTERS; TOPOLOGIES; SYSTEM;

D O I：

10.3390/electronics10040409

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

Cascaded multilevel converters based on medium-frequency (MF) AC-links have been proposed as alternatives to the traditional low-voltage inverter, which uses a bulky low-frequency transformer step-up voltage to medium voltage (MV) levels. In this paper, a three-phase cascaded DC-AC-AC converter with AC-link for medium-voltage applications is proposed. Three stages integrate each DC-AC-AC converter (cell): a MF square voltage generator; a MF transformer with four windings; and an AC-AC converter. Then, k DC-AC-AC converters are cascaded to generate the multilevel topology. This converter's topological structure avoids the per-phase imbalance; this simplifies the control and reduces the problem only to solve the per-cell unbalance. Two sets of simulations were performed to verify the converter's operation (off-grid and grid-connected modes). Finally, the papers present two reduced preliminary laboratory prototypes, one validating the cascaded configuration and the other validating the three-phase configuration.

引用

页码：1 / 21

页数：21

共 56 条

[11]

Barrios M.A., 2018, P IEEE CIEP C, P146

[12]

Beristáin J, 2003, IEEE POWER ELECTRON, P1191

[13] SAFE CONTROL OF 4-QUADRANT SWITCHES [J].